The website suggests that optional finishes are available for the speakers. The signal circuit is basically a 7B4 directly coupled to 2A3 with a series feed SE OPT. Dennis uses a low DCR/low Z power supply and over the top $$$ parts and wiring. Apparently, these amps have been refined over a few decades since he built the first set. I tried to do a very low budget industrial grade version of a similar circuit on a breadboard and it has turned out really good so far. But I also employed a robust DC filament supply for the 2A3, something I prefer over AC heating. I will caution that these type of amps are for high EF speakers for best results.

I'd like to hear these. I've enjoyed many 2a3 based amps over the years - Fi, Wright, Welborne. For whatever reason, I thought I heard that the parts quality was pedestrian - Hammond iron etc. I haven't followed that controversy at Audio Asylum for years tho, so my memory could be off.

I'd like to hear these. I've enjoyed many 2a3 based amps over the years - Fi, Wright, Welborne. For whatever reason, I thought I heard that the parts quality was pedestrian - Hammond iron etc. I haven't followed that controversy at Audio Asylum for years tho, so my memory could be off.

The OPT are custom wound by Magnaquest.

The wiring is Siltech and tubes are EML 2A3's.

The cathodes are bypassed by multiple bundles of expensive caps.

I think the power transformer is a Hammond, but perhaps that changed.

Not sure how it all adds up to $15k per set of amps, but someone is buying them or Dennis would be out of the tube amp business.

As far as the controversy regarding Serious Stereo, it still exists on the other audio forums.

There are a lot of engineering types who like to police things that don't conform to standard electronic practices.